Compression stop and waste.



P. MUBLLER. GOMPRESSION STOP AND WASTE.

APPLICATION PILEDMAR.8,1O6.

Patented June 28, 1910.

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Patented June 28, 1910.

2 SHEETS-SHEET 2.

P. MUELLER.

coMPRBssIoN STOP AND WASTE.

APPLICATION FILED MAR. 8, 1906.

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Invenor F72 Zi/U JaeZZer.

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co 'mmaunm mwsnsmzsu www n UNITED STATES PATENT OFFICE.

:PHILIP MUELLER, OF DECATUR, ILLINOIS. ASSIGNOR TO'II'E I-I. NEUELLER MANU- FACTURING COMPANY, OF DECATUR,

ILLINOIS, A CORPORATION OF ILLINOIS.

' COMPRESSION STOP AND WASTE,

Specification cf Letters Patent.

Patented June 2S, 1910.

Application filed March 8, 1906. Serial No. 304,991.

- a certain new and useful Compression Stop 45 here showna coupling nut specification the and lVaste, of which the following is a specification.

The invention is applicable to stop and waste cocks of faucets, to hydrants, and to any other appliances that act on the stopand-Waste principle.

The principal object of the invention is to avoid opening the tivo valves of a coinpression stop and Waste at the saine time,

- thus precluding possibility of Water under pressure reaching the packing or being forced through the waste; and another ohject is* to insure the operation of the invention as an ordinary stop and Waste in case the spring should become inoperative.

The invention is exemplified in the structure hereinafter described and it is defined inthe appended claims.

In the drawings forming part of this three Figures 1, 2, and 3, are eaclr a central section lengthwise of a stop and Waste cock embodying my invention. In Fig.m 1 the main valve ishown closed and the Waste valve is shown open. In Fig. 2 bothfvalves are shown closed, preparatory to opening the ina-invalve, and the parts are thus in an intermediate position. And. in Fi' 3 theV Waste valve is closed and the main va ve is opened.

In the drawings the numeral 1 designates the body of the cock which is here shown as of inverted T shape with a through passage across its head interrupted by a partition having a valve seat 2, and 3 is a lateral cylindri'cal extension Whose axis aliiies with that of the seat. The capy or bonnet et having' interior threads la is connected in any luitable manner With the extension 3, and 5 is siviveled ('snerueinherand threaded onto the othertg-ib'le Apacking being interposed between f'einbers. The Waste valve seat 14 is pre erwv formed Within and as a )art 'of the' (mp4 1.' of two r. d is herein shown as consisting mgsf'eariing surfaces with an annla" gI'QOV@ bet A v Ween tliem from which tgooae 1a Waste hole 15 communicates with ang Ojt l- Above the waste valve seat ,mit JY leguppei" end of the cap by a packing nut G, the initial pressure never reaches these elements for the reasons set forth beloiv.

A valve stein S extends through the nut 6 and packing l and has threads 10' engaging the threads la Within the cap, the upper or outer end ot the stein having a suitable handle 9. Near the loiver end of the stern it is reduced as at 12 so as to produce a `shoulder and again enlarged into a head or collar 13 at its extremity, and the main valve embraces this head and reduced portion in such inanner as to perinit it to have a certain free inotion As here shown, the shell 2O has a bearing surface :forv said shoulder pierced with a hole for the reduced portion and an enlarged cavity i1 Within which the head or collar 13 fits loosely. rlhe main valve disk is mounted in the lower end of the shell 20, and is here shown as held in place by ascreiv 24. On the stern Sis fixed a collar 11, beneath which is inounted loosely the shell 17a of the iva-ste valve, also having certain Jfree motion, the annular Waste valve disk 18 being located within said shell in position to cooperate with the seat 14. @n the stein is located a separator which is of less length than valves When they are distended tothe fullest extent permitted by the collars 11 and 13. cls here shown this separator is composed oi' tivo sleeves 17 and 19, and by preference they are integral with or connected with the valve shells 17a and 20 so as to forni guides for the latter'. An expansive spring 23 holds th( valves normally distended; and when th( separator is made in the forni of tivo sleeves as shown, they constitute convenient bear ings for the opposite ends of the spring. B) preference the stein is rotatable independ entlyv of both valves so that the latter are no necessarily ground upon their seats Whei they are closed.

In the operation of the complete device the main `valve stands open as sho-Wn in Fig 3 wherein the stern has been turned in th proper direction to raise it off its sea-t an the separator has raised the Waste valve s as to close it against its seat and shut othe Waste opening. The two parts of th separator are here in contact' and form sleeve or collar slidable on the stem sul stantially the saine as if itWere one sf' pieceY around the stern. In closing` tl tial turning ot the ste-1n` l BEST VAlLABLE COPY the distance between tlie,.,iV

main valve to close on its seat, when the parts assume an intermediate position shown in Fig. 2 wherein both valves are closed and the initial pressure is shut off. Continued turning of the handle next brings the collar 11 against the waste valve and the free motion possessed by the main valve permits the parts to assume their nal position as shown in Fig. 1 wherein the spring is compressed, the waste valve is unseated, and the waste under back pressure flows past the waste valve and out through the waste openings 15 and 16. Thus it will be seen that the only pressure which can possibly reach the packing 7 is the back pressure, but as the waste is open at this time the back pressure would never pass up between the threads 10 and 4ta.

In the position of parts shown in Fig. 1, it will be noted that the free motion between the stem and the shell of the main valve has permitted the shoulder 82 of the former to strike the bearing surface on the latter so that continued turning of the handle will force the main valve very reliably against its seat. Moreover, if the distance of the lower face of the load 13 below the shoulder is the same as the distance from the bearing face to the bottom of the cavity 2l, as shown in the drawings, it will be tween the other,

noted that in this position of parts there is a .second point of contactbetween the .lower extremity of the stem and the main valve, and there therefore exists two bearing surfaces so that if contact should not take place between one of them by reason of wear or inaccurate formation it would take place beand the main valve would be reliably seated in any event. If the valve disk 22 should become worn or a thinner one should be substituted, it is obvious that the tightening up of the screw 24 would cause its upper end to project slightly into the cavity where it would be struck by the collar or head 13 before the shoulder on the stem contacted with the bearing surface on the shell, but with either a thick or a thin disk 22 this construction of parts would always present at least one bearing surface on the main valve which would be engaged by the lower end of the stem at a proper time to reliably seat said valve after the waste valve had been opened. It is not inconsistent with the present invention that the sleeve 17 be made a trifle longer than herein shown. Such construction would cause the inner ends of the sleeves to abut earlier when they approached each other, and the main valve would not open so wide as shown in Fig. 3; and, as shown in Fig. l, it might be possible for said inner ends of the sleeves to abut at the same moment that 'he lower end of the stem engaged one or of the bearings surfaces on the main "1 nOllftruction would afford Bl'ST AVAILABLE COPY means for causing the collar 11 to force thl separator dow'n'iw'ard and press it upon thi bearing surface on the top of the shell 2O t( reliably grind the main valve upon its seat whether the shoulder on the stem or th(V lower face of the head 13 performed thii function or not.

lf the spring 23 should break or becomc weak or even be omitted, this device would' still be a compression stop and waste, the same as in a standard or solid stem compression stop and waste, except that it would lose the feature of having one valve closed before the other opens. That is to say, starting from the position shown in Fig. 3, the initial movement of the stem toward closing the main valve would perhaps immediately unseat the waste valve unless the pressure were sufficient to keep it seated; and in the intermediate position both valves would be open and the pressure might possibly reach the packing 7 although it would be diminished by reason of the leakage through the waste. Further rotation of the stem, however, would positively unseat the waste valve against any existing pressure when the collar l1 contacted with it; and the closed condition would be substantially that shown in Fig. 1. In other words, the separatorwhether in one 0r more members and whether they were connected with the valves or not-would then serve the function of closing the waste valve when the main valve was completely open as shown in Fig. 3, but of course'it would not prevent the waste valve from dro ping off its seat as the stem was turned to c ose the main valve, although f i the arrangement of parts is such that the initial pressure would probably perform this function.

What is claimed as new is:

1. In a device of the character described, a body having inlet and outlet with a main valve seat between, a valve for said seat, an exhaust communicating with the interior of the body, and a freely movable waste valve independent of the main valve and having a plurality of seating points for controlling v said exhaust. ,5'

2. In a device of the character described a body having inlet and outlet with a ma valve seat between, a main valve theref" an exhaust, and a waste valve loosely nected with a support independent ofthe?2 l. main valve and having two seating pnl for controlling the exhaust, one' of closing communication from it to, "'f p Port' "a ated 3. In a device of the charfer. Se air; l a body having inlet and atlet Wlt a mf valve seat between, a main valve there or, an exhaust, a waste valve loosel7 Connectc with a support independent of th? mal valve and having two seatingppll16S 0,1' cfm trnllinn- +L JM-L such length as to permit Certain free motion with respect to said Collars, and an expansive spring surrounding the sleeves and stem and tending to force the valves apart.

25. ln a compression stop and waste, the combination with a body having a through passage across one end connected with inlet and outlet and provided with a partition having a main valve seat, a lateral extension in axial line with said seat and itself having a waste valve seat, and a waste opening leading from said waste valve seat; of independent valves for the seats, a lengthwise-movable steni on which the valves are loosely mounted7 the main valve closing against and the waste valve with the initial pressure, and means for limiting the outward movement of said valves.

26. In a compression stop and waste, the Combination with a body having a through passage provided with a main valve seat, and a waste outlet and valve seatopposite said main valve seat; of independent valves for the seats, a lengthwise-movable stem on which the valves are loosely mounted, the main valve closing against and the waste valve with the inlet pressure, means for limiting the outward movement of said valves toward their seats7 and a spring tending to seat both valves.

In testimony whereof l sign my name in the presence of two subscribing witnesses. PHILIP MUELLER. Witnesses: l

JOHN L. VADDELL, ANNA MURPHY. 

